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《特种橡胶制品》2015,(6)
研究了酒石酸、硬脂酸和熔融硬脂酸对塑解剂DBD作再生活化剂时再生胶性能的影响。结果表明,随着酒石酸、硬脂酸和熔融硬脂酸用量的增加,再生胶的溶胶含量呈增大趋势,交联密度逐渐降低,门尼粘度和门尼粘度上升值降低,拉伸强度先增大后下降,酒石酸和硬脂酸用量为0.6份时,综合性能较优;熔融硬脂酸用量为0.9份时,综合性能较优。随着再生时间的延长,再生胶的溶胶含量呈明显上升趋势,交联密度和门尼粘度明显下降;拉伸强度和拉断伸长率随再生时间的延长呈下降趋势。熔融硬脂酸再生时间为20min时,门尼粘度较低,加工性能较好,拉伸强度和拉断伸长率下降较少,硬度较低,综合性能较好。 相似文献
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It is observed that reclamation of natural rubber latex based rubber using 2,2′‐dibenzamidodiphenyldisulphide as reclaiming agent is an optional methodology for recycling of waste latex rubber (WLR). For progressive replacement of virgin natural rubber by the reclaim, two alternatives curing system were investigated: adjustment or reduction of the curing system with increasing reclaim content, to compensate for the extra amount of curatives brought along by the reclaim. For fixed curing system, as if the reclaim were equivalent to virgin NR. The cure behavior, final crosslink density and distribution, mechanical properties, and dynamic viscoelastic properties of the blends with reclaimed WLR are measured and compared with the virgin compound. The morphology of the blends, sulfur migration, and final distribution are analyzed. The mechanical and dynamic viscoelastic properties deteriorate for both curing systems, but to a lesser extent for fixed curing system compared to adjusted curing system. With the fixed cure system, many properties like tensile strength and compression set do still deteriorate, but tan δ and M300/M100, representative for the rolling resistance of tires are improved. On the other hand, with the adjusted cure system both mechanical and dynamic properties still deteriorate. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102:4194–4206, 2006 相似文献
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研究了机械法再生硫化共聚氯醚橡胶(ECO)薄通次数及辊距对其性能的影响以及ECO再生胶的硫化体系的配合,结果表明通过适当机械再生工艺制造的ECO再生胶是可行的。较好的再生工艺条件为辊距0.4mm和薄通20次。ECO再生胶较好硫化体系配合为:NA-220.4;四氧化三铅4;硫黄0.2。 相似文献
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Sulfur cured natural rubber vulcanizates were reclaimed by a vegetable product and diallyl disulfide under various reclaiming conditions. Progress of reclaiming was monitored by estimating the sol and gel portions, molecular weight determination of sol portions, and Mooney viscosity of reclaimed rubber. Tensile properties and swelling characteristics of revulcanized reclaim rubber were studied. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2951–2958, 1999 相似文献
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Jinwei Shi Kuan Jiang Dongyun Ren Hua Zou Yao Wang Xuejian Lv Liqun Zhang 《应用聚合物科学杂志》2013,129(3):999-1007
Four different reclaiming methods involving important reclaiming factors such as temperature, shear force, and atmosphere were used to reclaim ground tire rubber. The structure and performance of the reclaimed rubber were investigated. The reclaimed samples were all found to be mixtures of three parts: the sol part, a loosely crosslinked gel part, and low molecular substances. For a reclaimed product to have both good processability and mechanical properties, the ideal structure should be that the sol fraction and its molecular weight (Mn) are as high as possible. However, the high sol fraction and high Mn cannot be reached at the same time because of the nonselective scission of the main chain and crosslink bonds. Thus, for a reclaimed rubber to have high quality, the presence of some amount of gel fraction is essential. Our preliminary results showed that the recommended reclaiming method would be a process under oxygen‐free atmosphere, without severe shear force, and at relative low temperature. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献
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Thermomechanical reclaiming of ground tire rubber via extrusion at low temperature: Efficiency and limits
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Thermomechanical reclaiming of ground tire rubber (GTR) was performed at different temperatures (60, 120, and 180°C) using a co‐rotating twin‐screw extruder. Obtained samples were used in styrene‐butadiene rubber (SBR) blends. As reference samples, SBR compounds containing untreated GTR were used. Curing characteristics, static and dynamic mechanical properties, and morphology of the obtained blends were determined. The results show that the increase of barrel temperature during the thermomechanical reclaiming of GTR has a positive effect on the decrease of screw torque (lower machine load) and decrease of Mooney viscosity (better processing characteristics). However, mechanical properties and crosslink density of rubber revulcanizate decreased with increasing barrel temperature during the reclaiming process. SBR blends with 50 phr of reclaimed rubber showed increasing phase compatibility between SBR matrix and the reclaimed rubber, which was confirmed by mechanical properties and morphology measurements. J. VINYL ADDIT. TECHNOL., 22:213–221, 2016. © 2014 Society of Plastics Engineers 相似文献
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橡胶再生剂A及其应用 总被引:4,自引:0,他引:4
橡胶再生剂A可以使硫化胶的交联键断裂。同时限制氧化作用对橡胶高分子主链的侵害。橡胶再生剂A适用于硫黄硫化的NR,SBR,BR,NBR,IIR,EPDM和CR硫化胶的再生。原材料可以是焦烧胶、硫化流失胶边和不合格的硫化制品,复原胶生产工艺简单。在常温下用开炼机或精炼机即可。而且生产过程中无污染。 相似文献
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研究以防老剂264作为橡胶再生剂的再生机理及其再生效果。结果表明,再生剂可以有效阻止游离基的再结合,限制氧化作用对橡胶主链的损害,同时可降低胶料粘度,增加流动性,在加入少量再生剂后即可获得较满意的物理性能。 相似文献
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The latex industry has expanded over the years to meet the world demands for gloves, condoms, latex thread etc. Because of the strict specifications for the products and the unstable nature of the latex, as high as 15% of the final latex products are rejected. Since waste latex rubber (WLR) represents a source of high quality rubber hydrocarbon, it is a potential candidate for generating reclaimed rubber of superior quality. Two types of WLR with different amounts of polysulfidic bridges are used in these experiments, which are reclaimed with variation of the concentration of the reclaiming agents, the reclamation temperature and time. Diphenyldisulfide, 2‐aminophenyldisulfide and 2,2′‐dibenzamidodiphenyldisulfide (DBADPDS) are used as reclaiming agents, and the effect of diphenyldisulfides (DPDS) with different substituents, on the reclamation efficiency of WLR is investigated. A kinetic study of the reclamation reaction with the three reclaiming agents is done. The reaction rates and activation energies are calculated and compared with literature values. The comparative study of the three different reclaiming agents shows that (DBADPDS) is able to break the crosslinks at temperature levels ~ 20°C below the temperature levels normally used with DPDS. Another advantage of this reclaiming agent is the reduced smell during the reclamation process and of the final reclaims, one of the most important shortcomings of other disulfides used for this purpose. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3562–3580, 2007 相似文献